.app-container{
    width: 100vw;
    height: 100vh;
    display: flex;
    flex-direction: column;
}
.app-header{
    height: 40px;
    width: 100%;
    border-bottom-width: 1px;
    border-bottom-style: solid;
}
.app-main{
    flex-grow: 1;
    background-color: #f4f4f4;
}
.app-side{
    width: 300px;
    height: 100%;
    border-right-width: 1px;
    border-right-style: solid;
    border-radius: 5px;
    overflow: auto;

}